last night i was at full throttle and truck started bucking in third and fourth and wouldn't go into overdrive then when i got home reverse is slipping horribly, wouldn't even back up my driveway, pulled codes P0766 shift solenoid D performance or stuck off & P2703 transmission friction element d apply time range/performance. anyone had this before? is this looking like a new tranny or maybe replace the solenoid?

last night i was at full throttle and truck started bucking in third and fourth and wouldn't go into overdrive then when i got home reverse is slipping horribly, wouldn't even back up my driveway, pulled codes P0766 shift solenoid D performance or stuck off & P2703 transmission friction element d apply time range/performance. anyone had this before? is this looking like a new tranny or maybe replace the solenoid?

sucks so bad man. let me know if i can do anything to help. I smell a suncoast tranny rebuild.

so pulled the trans pan off and the pics will show what the fluid looked like, as it was draining out the fluid looked perfect, even had that distinctive trans fluid smell, there were small particles (clutch i"m assuming) that were in the bottom but not much and the one napkin i used that is black is what came off the magnet, the fluid that is in the pan is what came out of the filter when i turned it upside down, it was kinda dark. the other picture is of the solenoid i changed (red arrow). can someone confirm that that is the correct solenoid (D) for 5th and reverse? i put everything back together with 9 quarts of new fluid and new filter using all ford fluid and filter and went to test drive and had same problem and threw the same codes after i cleared them with my blackmaxx. thanks for any input!

I'm brand spanking new to diesels, and haven't even driven my 6.4 yet, but i know a little about transmissions...

You're not going to like this..

The code may be the computers interpretation of ways wrong, but often times that is downwind from the real issue.. the band, knowing nothing about these rigs but in general, sometimes serves high and low.. meaning, the band that grips fifth gear may be the same one that grips reverse... And that, my friend, is what it sounds like- a bad band, or band anchor.. usually, there is evidence of a dropped anchor, as its laying in your pan when you drop it.. what you've described sounds like the band itself..

That means the band has to be fixed.. which often means the trans has to be pulled.. but, some designs allow for replacement installed, and/or two piece half moon fixes..

My advice, Fwiw, is that you'll be better served having a trans shop with a good rep check it out.. and if youre doing just a little to it, the price difference with doing a lot is negligible, as in rebuild time..

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